Improvement in artificial stone



I06. COMPOSITIONS,

COATING OR PLASTIC.

M I pajama) UNITED STATES THOMAS MILLEN, ()I SYRACUSE, NE\V YORK.

IMPROVEMENT IN ARTIFICIAL STONE.

Specification t'ormirg part of Letters Patent No. 150,178, dated Apiil 28, P 74; application tiled Jaruary 19, 1574.

To all whom it may concern:

Be it known that I, THOMAS MILLEN, of Syracuse, New York, have invented certain Improvements in Artificial Stone, of which the following is a specification:

Numerous methods have been essayed to manufacture a durable stone out of hydraulic cement and other materials, by processes more or less complex; but none have given such perfect results as to be universally adopted, from want of etliciency or cheapness.

My present improvement is for the purpose of obviating previous objections, and by it I can cheaply make a hard and durable artificial stone.

The composition is as follows: Take three parts, by measure, of oluble lass and one part of carbonate oi ammonia, ant llllX it with water in t 10 proportion o a alf pint to four gaIIons of water. This is used to wet the solid materials, consisting of hvdraulic cement,

sand and ravel. in proportions well known to manufamof hydraulic-cement artificial stone, and make it into a mortar suttlciently homogeneous and plastic to be formed in molds of the shape desired. This compound readily and quickly hardens, and forms a stone as durable as limestone or other natural stone formations.

Having thus fully described my improvement in manufacturing artificial stone, I claim- The compound herein described, consisting of the soluble glass amtcarbonate of annnonia/ for mixing the cement with the sand, gravel, 850., into a mortar, for molding into artificial stone, as and for the purposes herein specified.

THOMAS MILLEX.

Witnesses:

.T. J. GREENOUGH, A. J ONES. 

